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Dissipative Forces. Reality? In reality, non-conservative forces cannot be ignored: friction really does act Dissipative force is one that reduces the.

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Presentation on theme: "Dissipative Forces. Reality? In reality, non-conservative forces cannot be ignored: friction really does act Dissipative force is one that reduces the."— Presentation transcript:

1 Dissipative Forces

2 Reality? In reality, non-conservative forces cannot be ignored: friction really does act Dissipative force is one that reduces the total mechanical energy The total energy is conserved, it is just converted into useless forms (heat from friction) KE 1 + PE 1 = KE 2 + PE 2 + Dissipative Force

3 Friction Most Common Friction depends on the distance traveled W f = F f d KE 1 + PE 1 = KE 2 + PE 2 + F f d

4 Example A 1000kg roller coaster car starting from a height of 40m is found to reach a vertical height of only 25m on the next hill. If the total distance traveled was 400m. Find the force of friction acting on the car.

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